curl --request POST \
  --url https://s-apis.oppigames.com/game/conversion-rates \
  --header 'Content-Type: <content-type>' \
  --header 'x-api-key: <x-api-key>' \
  --header 'x-signature: <x-signature>' \
  --header 'x-timestamp: <x-timestamp>' \
  --data '
{
  "currency": "<string>",
  "amount": 123
}
'

import requests

url = "https://s-apis.oppigames.com/game/conversion-rates"

payload = {
    "currency": "<string>",
    "amount": 123
}
headers = {
    "x-api-key": "<x-api-key>",
    "x-signature": "<x-signature>",
    "x-timestamp": "<x-timestamp>",
    "Content-Type": "<content-type>"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'x-api-key': '<x-api-key>',
    'x-signature': '<x-signature>',
    'x-timestamp': '<x-timestamp>',
    'Content-Type': '<content-type>'
  },
  body: JSON.stringify({currency: '<string>', amount: 123})
};

fetch('https://s-apis.oppigames.com/game/conversion-rates', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://s-apis.oppigames.com/game/conversion-rates",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'currency' => '<string>',
    'amount' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: <content-type>",
    "x-api-key: <x-api-key>",
    "x-signature: <x-signature>",
    "x-timestamp: <x-timestamp>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}